Distribution:
Endemic to Australia; Cairns, Qld, to Great Australian Bight.

Habitat:
Subtidal, to 284 m. Uncommon.

Synonym:
Iredale introduced Notocochlis schoutanica diatheca Iredale, 1936
for a shell from northern NSW, on the basis that the umbilical funicle
differed from that of Tasmanian shells. However, the strength of the
funicle varies considerably within NSW specimens, with diatheca
falling within the range of variation, so the subspecific name is
unnecessary.